from PIL import Image
import argparse
#格式
parser = argparse.ArgumentParser()
parser.add_argument('file')
parser.add_argument('-o','--output')
parser.add_argument('--width',type = int ,default = 80)
parser.add_argument('--height',type = int, default = 80)
args = parser.parse_args()
IMG = args.file
WIDTH = args.width
HEIGHT = args.height
OUTPUT = args.output
ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!;:,\"^`'.")

def get_char(r,b,g,alpha = 256):
	if alpha == 0:
		return ' '
	length = len(ascii_char)
	gray = int(0.2126*r+0.7152*g+0.0722*b)

	unit = (256.0+1)/length
	return ascii_char[int(gray/unit)]

if __name__ == '__main__':
	im = Image.open(IMG)
	im = im.resize((WIDTH,HEIGHT),Image.NEAREST)

	txt = ""

	for i in range(HEIGHT):
		for j in range(WIDTH):
			txt += get_char(*im.getpixel((j,i)))
		txt += '\n'

	print(txt)

	if OUTPUT:
		with open(OUTPUT,'w') as f:
			f.writh(txt)
	else:
		with open("output.txt",'w') as f:
			f.write(txt)
